Attributes 

src 
The src attribute provides the URL address of any valid HTML, ASP, or other displayable page. The contents of the referenced URL will be displayed inside the frame. 

width
The width attribute sets the horizontal extent of the iframe in either pixels or as a percentage of the overall screen width.

height 
The height attribute sets the vertical extent of the iframe in either pixels or as a percentage of the overall screen height. 

align 
The align attribute is used to place the frame inline with adjacent text. The values bottom, middle, and top align the frame with the bottom, middle, and top of the text. The values right and left place the text on the right or left boundary and allow any text to flow around the frame. 
 
frameborder 
The frameborder attribute is used to add or remove a border around the frame. The values of yes or 1 allow a border. The values of no or 0 forbid a border. 
 
marginheight 
The marginheight attribute is used to set the amount of white space in pixels that will appear along the top and bottom margins between the frame border and the contents. If you provide an unrealistic value, the browser will simply ignore this attribute. 
 
marginwidth 
The marginwidth attribute is used to set the amount of white space in pixels that will appear along the left and right margins between the frame border and the contents. If you provide an unrealistic value, the browser will simply ignore this attribute. 
 
scrolling 
The scrolling attribute is used to determine if horizontal and vertical scrolling bars will appear in the iframe. If the content is larger than the frame, this permits scrolling up and down or left and right, as needed, to see the entire contents. There are three permitted values: yes which always displays scroll bars; no which never displays scroll bars; and auto which displays scroll bars only when needed. If a value is not provided, the default is auto.